/*
 * Copyright (C) 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.skateboard.zxinglib;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.MediaStore;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.ChecksumException;
import com.google.zxing.DecodeHintType;
import com.google.zxing.FormatException;
import com.google.zxing.NotFoundException;
import com.google.zxing.RGBLuminanceSource;
import com.google.zxing.Result;
import com.google.zxing.ResultMetadataType;
import com.google.zxing.client.result.ResultParser;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.QRCodeReader;
import com.skateboard.zxinglib.camera.CameraManager;

import java.io.IOException;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Collection;
import java.util.EnumSet;
import java.util.Hashtable;
import java.util.Map;

/**
 * This activity opens the camera and does the actual scanning on a background thread. It draws a
 * viewfinder to help the user place the barcode correctly, shows feedback as the image processing
 * is happening, and then overlays the results when a scan is successful.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 * @author Sean Owen
 */
public class CaptureActivity extends Activity implements SurfaceHolder.Callback {

    private static final String TAG = CaptureActivity.class.getSimpleName();

    private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L;
    private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;
    public static String KEY_DATA = "key_data";

    private static final Collection<ResultMetadataType> DISPLAYABLE_METADATA_TYPES =
            EnumSet.of(ResultMetadataType.ISSUE_NUMBER,
                    ResultMetadataType.SUGGESTED_PRICE,
                    ResultMetadataType.ERROR_CORRECTION_LEVEL,
                    ResultMetadataType.POSSIBLE_COUNTRY);

    private CameraManager cameraManager;
    private CaptureActivityHandler handler;
    private Result savedResultToShow;
    private ViewfinderView viewfinderView;
    private TextView statusView;
    //  private View resultView;
    private Result lastResult;
    private boolean hasSurface;
    private IntentSource source;
    private Collection<BarcodeFormat> decodeFormats;
    private Map<DecodeHintType, ?> decodeHints;
    private String characterSet;
    //  private HistoryManager historyManager;
    private InactivityTimer inactivityTimer;
    private BeepManager beepManager;
    private AmbientLightManager ambientLightManager;

    private ImageView iv_close, iv_image;

    ViewfinderView getViewfinderView() {
        return viewfinderView;
    }

    public Handler getHandler() {
        return handler;
    }

    CameraManager getCameraManager() {
        return cameraManager;
    }

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

//        Window window = getWindow();
//        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Window window = getWindow();
            window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        }
        setContentView(R.layout.capture);


        hasSurface = false;
        inactivityTimer = new InactivityTimer(this);
        beepManager = new BeepManager(this);
        ambientLightManager = new AmbientLightManager(this);

        //    PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
    }


    @Override
    protected void onResume() {
        super.onResume();
        cameraManager = new CameraManager(getApplication());
        viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
        viewfinderView.setCameraManager(cameraManager);

        //    resultView = findViewById(R.id.result_view);
        statusView = (TextView) findViewById(R.id.status_view);
        iv_image = findViewById(R.id.iv_image);
        iv_close = findViewById(R.id.iv_close);
        iv_close.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
            }
        });
        iv_image.setVisibility(View.GONE);
        iv_image.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
//                ArrayList<String> imagePaths = new ArrayList<>();
//                PhotoPickerIntent intent = new PhotoPickerIntent(CaptureActivity.this);
//                intent.setSelectModel(SelectModel.SINGLE);
//                intent.setShowCarema(false);
//                intent.setMaxTotal(1);
//                intent.setSelectedPaths(imagePaths);
//                startActivityForResult(intent, Constant.PHOTO_REQUEST_GALLERY);
            }
        });
        handler = null;
        lastResult = null;

        resetStatusView();


        beepManager.updatePrefs();
        ambientLightManager.start(cameraManager);

        inactivityTimer.onResume();

        source = IntentSource.NONE;
        decodeFormats = null;
        characterSet = null;

        SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
        SurfaceHolder surfaceHolder = surfaceView.getHolder();
        if (hasSurface) {
            // The activity was paused but not stopped, so the surface still exists. Therefore
            // surfaceCreated() won't be called, so init the camera here.
            initCamera(surfaceHolder);
        } else {
            // Install the callback and wait for surfaceCreated() to init the camera.
            surfaceHolder.addCallback(this);
        }
    }

    @Override
    protected void onPause() {
        if (handler != null) {
            handler.quitSynchronously();
            handler = null;
        }
        inactivityTimer.onPause();
        ambientLightManager.stop();
        beepManager.close();
        cameraManager.closeDriver();
        //historyManager = null; // Keep for onActivityResult
        if (!hasSurface) {
            SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
            SurfaceHolder surfaceHolder = surfaceView.getHolder();
            surfaceHolder.removeCallback(this);
        }
        super.onPause();
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            switch (requestCode) {
//                case Constant.PHOTO_REQUEST_GALLERY:
////                    handleAlbumPic(data);
//                    String path = data.getStringArrayListExtra(PhotoPickerActivity.EXTRA_RESULT).get(0);
//                    //启动线程完成图片扫码
//                    new QrCodeAsyncTask(this, path).execute(path);
//                    break;
                default:
                    break;
            }
        }
    }

    /**
     * AsyncTask 静态内部类，防止内存泄漏
     */
    static class QrCodeAsyncTask extends AsyncTask<String, Integer, String> {
        private WeakReference<Activity> mWeakReference;
        private String path;

        public QrCodeAsyncTask(Activity activity, String path) {
            mWeakReference = new WeakReference<>(activity);
            this.path = path;
        }

        @Override
        protected String doInBackground(String... strings) {
            // 解析二维码/条码
            return QRCodeParseUtils.syncDecodeQRCode(path);
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            //识别出图片二维码/条码，内容为s
            CaptureActivity activity = (CaptureActivity) mWeakReference.get();
            if (activity != null) {
                activity.handleQrCode(s);
            }
        }
    }

    /**
     * 处理图片二维码解析的数据
     *
     * @param s
     */
    public void handleQrCode(String s) {
        if (null == s) {
            Toast.makeText(this, "该图片无法识别二维码", Toast.LENGTH_LONG).show();
        } else {
            handleResult(s);
        }
    }


    private void handleAlbumPic(Intent data) {
        //获取选中图片的路径
        final Uri uri = data.getData();
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                scanningImage(uri);
            }
        });
    }

    /**
     * 扫描二维码图片的方法
     *
     * @return
     */
    public void scanningImage(Uri uri) {
        if (uri == null) {
            return;
        }
        Hashtable<DecodeHintType, String> hints = new Hashtable<>();
        hints.put(DecodeHintType.CHARACTER_SET, "UTF8"); //设置二维码内容的编码
        Bitmap scanBitmap = BitmapUtil.decodeUri(this, uri, 500, 500);
        int width = scanBitmap.getWidth();
        int height = scanBitmap.getHeight();
        int[] datas = new int[width * height];
        scanBitmap.getPixels(datas, 0, width, 0, 0, width, height);
        RGBLuminanceSource source = new RGBLuminanceSource(width, height, datas);
        BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source));
        QRCodeReader reader = new QRCodeReader();
        Result re = null;
        try {
            re = reader.decode(bitmap1);
        } catch (NotFoundException e) {
            e.printStackTrace();
        } catch (ChecksumException e) {
            e.printStackTrace();
        } catch (FormatException e) {
            e.printStackTrace();
        }
        if (re == null) {
            Toast.makeText(CaptureActivity.this, "二维码解析失败", Toast.LENGTH_SHORT).show();
        } else {
            handleResult(re.getText());
        }
    }

    @Override
    protected void onDestroy() {
        inactivityTimer.shutdown();
        super.onDestroy();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_BACK:
                if (source == IntentSource.NATIVE_APP_INTENT) {
                    setResult(RESULT_CANCELED);
                    finish();
                    return true;
                }
                if ((source == IntentSource.NONE || source == IntentSource.ZXING_LINK) && lastResult != null) {
                    restartPreviewAfterDelay(0L);
                    return true;
                }
                break;
            case KeyEvent.KEYCODE_FOCUS:
            case KeyEvent.KEYCODE_CAMERA:
                // Handle these events so they don't launch the Camera app
                return true;
            // Use volume up/down to turn on light
            case KeyEvent.KEYCODE_VOLUME_DOWN:
                cameraManager.setTorch(false);
                return true;
            case KeyEvent.KEYCODE_VOLUME_UP:
                cameraManager.setTorch(true);
                return true;
        }
        return super.onKeyDown(keyCode, event);
    }


    private void decodeOrStoreSavedBitmap(Bitmap bitmap, Result result) {
        // Bitmap isn't used yet -- will be used soon
        if (handler == null) {
            savedResultToShow = result;
        } else {
            if (result != null) {
                savedResultToShow = result;
            }
            if (savedResultToShow != null) {
                Message message = Message.obtain(handler, R.id.decode_succeeded, savedResultToShow);
                handler.sendMessage(message);
            }
            savedResultToShow = null;
        }
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        if (holder == null) {
            Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
        }
        if (!hasSurface) {
            hasSurface = true;
            initCamera(holder);
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        hasSurface = false;
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        // do nothing
        hasSurface = false;
    }

    /**
     * A valid barcode has been found, so give an indication of success and show the results.
     *
     * @param rawResult   The contents of the barcode.
     * @param scaleFactor amount by which thumbnail was scaled
     * @param barcode     A greyscale bitmap of the camera data which was decoded.
     */
    public void handleDecode(Result rawResult, Bitmap barcode, float scaleFactor) {
        inactivityTimer.onActivity();
        lastResult = rawResult;
        //    ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);

//        boolean fromLiveScan = barcode != null;
//        if (fromLiveScan)
//        {
        //      historyManager.addHistoryItem(rawResult, resultHandler);
        // Then not from history, so beep/vibrate and we have an image to draw on
        beepManager.playBeepSoundAndVibrate();
        viewfinderView.drawResultBitmap(barcode);
//            drawResultPoints(barcode, scaleFactor, rawResult);
//        }
        handleDecodeInternally(rawResult, barcode);

    }

    // Put up our own UI for how to handle the decoded contents.
    private void handleDecodeInternally(Result rawResult, Bitmap barcode) {

        String result = ResultParser.parseResult(rawResult).getDisplayResult().toString().trim();
        handleResult(result);

    }

    private void handleResult(String result) {
        Intent intent = new Intent();
        intent.putExtra(KEY_DATA, result);
        setResult(Activity.RESULT_OK, intent);
        finish();
    }


    private void initCamera(SurfaceHolder surfaceHolder) {
        if (surfaceHolder == null) {
            throw new IllegalStateException("No SurfaceHolder provided");
        }
        if (cameraManager.isOpen()) {
            Log.w(TAG, "initCamera() while already open -- late SurfaceView callback?");
            return;
        }
        try {
            cameraManager.openDriver(surfaceHolder);
            // Creating the handler starts the preview, which can also throw a RuntimeException.
            if (handler == null) {
                handler = new CaptureActivityHandler(this, decodeFormats, decodeHints, characterSet, cameraManager);
            }
            decodeOrStoreSavedBitmap(null, null);
        } catch (IOException ioe) {
            Log.w(TAG, ioe);
            displayFrameworkBugMessageAndExit();
        } catch (RuntimeException e) {
            // Barcode Scanner has seen crashes in the wild of this variety:
            // java.?lang.?RuntimeException: Fail to connect to camera service
            Log.w(TAG, "Unexpected error initializing camera", e);
            displayFrameworkBugMessageAndExit();
        }
    }

    private void displayFrameworkBugMessageAndExit() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        //    builder.setTitle(getString(R.string.app_name));
        builder.setMessage(getString(R.string.msg_camera_framework_bug));
        builder.setPositiveButton(R.string.button_ok, new FinishListener(this));
        builder.setOnCancelListener(new FinishListener(this));
        builder.show();
    }

    public void restartPreviewAfterDelay(long delayMS) {
        if (handler != null) {
            handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);
        }
        resetStatusView();
    }

    private void resetStatusView() {
        //    resultView.setVisibility(View.GONE);
        statusView.setText(R.string.msg_default_status);
        statusView.setVisibility(View.VISIBLE);
        viewfinderView.setVisibility(View.VISIBLE);
        lastResult = null;
    }

    public void drawViewfinder() {
        viewfinderView.drawViewfinder();
    }
}
